What is the unloader valve on a pressure washer?


The unloader valve is a pressure washer's most important safety feature. The unloader valve allows pressure to be released when the trigger is not engaged, preventing the machine from building up too much pressure, is designed to respond to an increase in pressure or a change in water flow. 

The unloader valve is located between the pump and the trigger, if the unloader valve is not working properly, the pressure washer can be very dangerous. Always check the unloader valve before using a pressure washer, and be sure to follow the instructions for its proper use.

Search by Product.

Scroll through the complete list of Hawk pumps available, or enter the name of the model to see all search results.

Search byApplications.

Hawk pumps are used for an endless range of applications. Click on the application that best meets your needs and view all the results available.

Search by Pressure and Flow rate.

Want to search for a Hawk pump based on technical characteristics? Enter a value for the pressure and/or flow rate. A list of Hawk pumps that meet all your parameters will be displayed.